chore: sync local Mosaic changes

install.ps1

@@ -143,6 +143,21 @@ catch {
     Write-Warn "Runtime asset linking failed (non-fatal)"
 }
 
+try {
+    & "$binDir\mosaic-ensure-sequential-thinking.ps1" *>$null
+    Write-Ok "sequential-thinking MCP configured"
+}
+catch {
+    if ($env:MOSAIC_ALLOW_MISSING_SEQUENTIAL_THINKING -eq "1") {
+        Write-Warn "sequential-thinking MCP setup failed but bypassed (MOSAIC_ALLOW_MISSING_SEQUENTIAL_THINKING=1)"
+    }
+    else {
+        Write-Fail "sequential-thinking MCP setup failed (hard requirement)."
+        Write-Fail "Set MOSAIC_ALLOW_MISSING_SEQUENTIAL_THINKING=1 only for temporary bypass scenarios."
+        exit 1
+    }
+}
+
 if ($env:MOSAIC_SKIP_SKILLS_SYNC -eq "1") {
     Write-Ok "Skills sync skipped (MOSAIC_SKIP_SKILLS_SYNC=1)"
 }